1 From 1ce8667062bc7b8813adf6103ad2374d9dd52fb0 Mon Sep 17 00:00:00 2001
2 From: Jean-Francois Moine <moinejf@free.fr>
3 Date: Mon, 25 Nov 2013 19:47:04 +0100
4 Subject: [PATCH 163/182] clk: return probe defer when DT clock not yet ready
6 At probe time, a clock device may not be ready when some other device
9 This patch lets the functions clk_get/devm_clk_get return a probe defer
10 when the clock is defined in the DT but not yet available.
12 Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
13 Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
14 Tested-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
15 Signed-off-by: Mike Turquette <mturquette@linaro.org>
17 drivers/clk/clk.c | 2 +-
18 drivers/clk/clkdev.c | 2 ++
19 2 files changed, 3 insertions(+), 1 deletion(-)
21 --- a/drivers/clk/clk.c
22 +++ b/drivers/clk/clk.c
23 @@ -2507,7 +2507,7 @@ EXPORT_SYMBOL_GPL(of_clk_del_provider);
24 struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec)
26 struct of_clk_provider *provider;
27 - struct clk *clk = ERR_PTR(-ENOENT);
28 + struct clk *clk = ERR_PTR(-EPROBE_DEFER);
30 /* Check if we have such a provider in our array */
31 list_for_each_entry(provider, &of_clk_providers, link) {
32 --- a/drivers/clk/clkdev.c
33 +++ b/drivers/clk/clkdev.c
34 @@ -167,6 +167,8 @@ struct clk *clk_get(struct device *dev,
35 clk = of_clk_get_by_name(dev->of_node, con_id);
38 + if (PTR_ERR(clk) == -EPROBE_DEFER)
42 return clk_get_sys(dev_id, con_id);